And bror f



(No Model.) 3 sheets-sheet 1.

H. 1:". PARSONS 8v B. F. BERGH.

1100K DRILLING MACHINE. No. 309,160.

Patented Dec. 9.,V 1884..

By #wir .dltarneys Y (No Model.) 3 Sheets-Sheet 2.

H. PARSONS 8v B. F. BERGH. ROCK DRILLNG MAGHINE.

No. 309,160. u Patented Deo. 9, 1884.

lll/lllll/ (No Model.) l v Y 3 Sheets-Sheet 3.

H. P. PARSONS 8v B. F. BERGH.

ROCK DRILLING MACHINE.

Patented Dee. 9, 1884.

INVENTORS;

WITNESSES- N PETERS. Phew Lnmgmphw. wmwgmu, 11C4 ilnrrnn @rares Parenti*Ormea.

HENRY FRANCIS PARSONS, OF JERSEY CITY, NEW JERSEY, AND BROR F. BERGH, OFNEV YORK, N. Y., ASSIGNORS, BY MESNE ASSIGNMENTS, TO

EDYARD J. N. STENT.

ROCK-DRILLING MACHINE.

.SPECIFICATION forming part of Letters Patent No. 309,160, datedDecember 9, 1884.

Application tiled May 24, 1883. (No model.)

Zh all whom it may concern:

Be it known that we, HENRY F. PARsoNs, of Jersey City, New Jersey, andBROR F. BERGI-I, of New York city, New York, have in` vented certain newand useful Improvementsiu took-Drilling Machines, of which the followingis a specification.

O11 the 12th day of September, 1881, said Parsons and oneHugo Borchardtfiled an application for a patent, which application was allowed on the7th day of March, 1883. Said application shows and describes a handrockdrill machine. On the 29th day of September, 1882, said Parsons ledanother application forimprovement upon said hand rock-drill machine.

The present application relates to improvements upon the rock-drillmachines shown in said applications.

The first part of ourinvention relates to an improvement in mechanism bywhich power is obtained for causing the hammer to give its blow; and itconsists in the combination, with a rubber spring, of mechanism whichcompresses the rubber when the hammer is raised, and which communicatesthe expansive power of the rubber to the hammer when the latter isreleased.

rFile second part of our invention relates to the mechanism by which thedrill-holder is raised; and it consists in the combination, with suchdrill-holder, of a lever which receives its motion from the hammer-arm,substantially in the manner hereinafter pointed out.

rlhe third part ol" our invention relates to the mechanism by which thedrill is revolved and directed; and it consists in the combination, withthe mechanism for revolving the drill, of mechanism which insures itsretention in the revolved position, and prevents it from being revolvedback again on its return to the bottom of the bore-hole.

The fourth part of our invention relates to an improvement in mechanismby which the machine is fed forward on its supports as the drilling`proceeds; and it consists inthecombination, with a rack or equivalentdevice attached to the supports, of a pinion or equivavthe drill-holderor plunger.

lent device attached to the machine, the motion of which pinion isgoverned by mechanism which is in turn set in motion by the action ofthe drill-rod upon astop whenever the drill has advanced to a certainpoint relatively to the other parts of the machine. l

The iifth part of our invention relates to the manner of securing thedrill-machine to a column whenever one is used.

The sixth part of our invention relates to an improvement in the mannerof securing the drill to the drill-holder or plunger; and it consists inthe construction of a socket with removable lining, so that by simplychanging the lining ofthe socket to one having a proper interiorconfiguration the socket may be adapted to receive drill-rods in variousforms in section.

XVe will now proceed to describe in detail the specific form of machinein which we prefer to embody our inventions, though we do not limitourselves to the special construction shown.

Figure l represents a front view of our machine as mounted upon a columnin the shaft of a mine. 'Fig 2 represents a side view of the same, withportions of the drill and guide-rods removed, the hammer being down.Fig. 3 represents a top view of the same, with the hammer-head and aportion of the hammer-arm removed, the parts being in the position theyoccupy when the hammer is raised. Fig. et represents a side view of thething shown in Fig. 3, but with portions of the parts removed and otherportions in section, to display the mode of operation. Fig. 5 representsin detail a front view of a portion of the parts employed in controllingthe motion of the pinion by which the machine is fed forward on therack. Figs. 6 and 7 represent, respectively, a sectional plan view and asectional side view of the mechanism by which the drill-rod is attachedto Fig. 8 represents a sectional plan view through the line 8 8, Fig. 2,showing the arrangement of the ratchet and pawl for governing therotation of the drill-holder. Fig. 9 represents averti- Cal sectionshowing the arrangement by which e 'eoalee 4ni@ Striking-piu is securedto the drin-holder or plunger. Fig. l() represents in detail therelative arrangement of the pawl of', and its two arms and pivot, andthe wheels 0 and p with which it engages, as they appear when lookingfrom the rear of the machine.

a is the drill.

b is the drill-holder or plunger. Y

c is the frame upon which the operative parts are mounted. In theforward part of this frame is formed the barrel which serves to hold anddirect the plunger, and from this barrel the frame extends backward intwo divisions, which receive parts of the machine between them, andconverge toward each oth-- er at the rear, where they unite to form thebearing of the hammer-arm.

d is the hammer arm or helve, which bears the head d, and is pivoted tothe rear end of the frame at c. Attached to this helve is an arm, c,which is acted upon by cams, similar to those described in theapplications already referred to, which cams receive their motion fromthe levers ff', as described in said applications.

g is a lever pivoted intermediate its two ends to the frame at g. Oneend of this lever g is connected with the helve of the hammer at a pointin the rear of the pivot e by the link h, which is pivoted bothto thelever g and the helve cl of the hammer, so as to permit of the requisitemotions of the two. rlhe lever f/ is forked at its forward end, so as topartially encircle the plunger b, as shown at g", Figs. 3 and 4, belowthe collar b', which is attached to the plunger, and with which thelever g engages, so as to lift the plunger.

t is a rod which passes through the lever g, and to which it is securedby a set-screw, as shown. The rod t' projects downwardly below Vsaidlever until it terminates in the head fi, which is made to reciprocatewithin the inclosure or box j, which box is open at the lower end andclosed at the top, save where the rod t' passes into it, and which isattached to the frame c. X'Vithin this box is placed around the rod t'an annular collar of rubber, t, which is held between the top of the boxj and the head i of the rod 7c k are the guidc-rods ofthe machine,whiehare preferably rectangular, and which are notched into the frame c ot'the machine on either side of the plunger, as shown in Fig. 3. Theseguide-rods are joined together at top and bottom by the piece c/at'thetop and the piece c at the bottom, which are each bowed forwardsufficiently to permit the drill, drillholder, and hammer to operatebetween the guide-rods. rlhe piece 0"is also attached only to theouterportions of the guide-rods, as shown in Fig. 3, and does notsurround the guide-rods, so that the frame c may slide up past the piecec on the guide-rods, and the operative parts of the machine be thusreadily placed upon or detached from the supports when in position. Toone of these guide-rods is attached the rack Z; or the rack maybe formeddirectly on the face ofthe guide-rod, as shown in Fig. 3. m is apinionmounted fast upon the shaft n..

rlhe object of the rack Z and pinion m is to provide a travelingconnection between the frame supporting the hammer and the standards ofthe machines, and other mechanism might be employed for the same, whichI should consider the equivalent of the particular mechanism shown. Thisshaft n extends across between the branches of the frame c, and upon itis also mounted loosely the wheel o. In the periphery of this wheel iscut one notch, o', and on its face are provided serra` tions inclined onone side and vertical on the other, which engage with correspondingserrations in the wheel p, as'shown in Figs. 5 and 10.

p is a wheel also mounted upon the shaft n and fast to said shaft, whichwheel is provided upon its periphery with a series ot' notchescorresponding in width and depth with the notch o.

q is a rod which is pivoted at one end to the face ofthe wheel o, nearits periphery, and which projects thence upwardly loosely through a holemade in the lever g to receive it, as shown in Fig. 4. Upon itsend,whieh projects above the lever, there is screwed a nut, so that itis prevented from passing down through the lever g by reason of itspassing loosely through the hole. v

r is a pawl which is pivoted intermediate its two ends, and providedwith a downwardly-extending lip on one end. The two arms of this pawl, rand r, are not opposite each other, but are arranged along its pivot, asshown in Figs. 3 and l0, so that the arm r is in the line of travel ofthe shoulder b on the plunger, while the arm r is arranged so that thedownwardly-extending lip at its extremity rests upon the peripheries ofthe wheels o and p, upon which it is pressed by the spring 1", so thatwhen these wheels have revolved so as to bring the notch o and one ofthe notches in the wheel p under the lip upon the pawl r, said lip willbe yforced to engage with such notches by the -spring r', as shown inFig. 4. rllhc opposite end of the pawl r is in such position that whenthe plunger or drillholder has passed beyond a certain point, the shoulder b situated upon it will engage with the pawl and lift the lip uponits opposite end out of the notches already referred to.

Upon the side of the wheel p next the frame c the wheel is beveled off,so as to present a male conical frictioirsurface, which engages with afemale conical friction-surface turned upon the inner side of the framec, as shown in Fig. 5. Between these conical surfaces leather may beintroduced to improve the frictional connection.

Cast with the wheel o on the opposite side from the wheel p is a sleeve,a', which extends concentrically around the shaft u from the wheel o,nearly tothe inner side of the IOD IIO

t'ranie c, sullicient space being lett between the end of the sleeve aand the frame cto admit of sufficient longitudinal motion ot' the wheelo away from the wheel p, for the disenA gagement ot' the serrationsshown upon the opposing faces of the two wheels. y

s is aspiral spring, situated upon the sleeve n', and attached to thatsleeve and the inner side of the frame c in such manner as to constantlytend to revolve that sleeve in the direction of the arrow, Fig. et, andalso to tend to press the wheel p toward the frame c next it, wherebythe conical frictional surfaces already referred to are held in contact,and the serrations on the two wheels are held in engagement by ayielding pressure.

ai is a cra-nk attached to the shalt n, by which the pinion m may beturned by hand, s as to raise the machine on the rack Z when it isdesired to do so. r r

9 is a rod which may be revolved and retraeted` by t-he head 10. Vhenthis rod has been retracted and revolved half round, the V-shaped lip(shown in Fig. 3) on the face oll the head next the i'rume will hold therod in the retracted position until it is turned round, so that thelipffalls into the groove provided for it. This rod i) is provided witha groove at 7 into which the flange o" of the wheel o lits, so that whenthe rod 9 is retracted the wheel o will be drawn away from this wheel pagainst the pressure ot' the spring s until the serrations between thewheels 0 and p are disengaged. rlhe rod 9 is also provided with a notchon one side, which, when the V-shaped lip on the inner side of the headl() rests in the groove on the frame, as shown in Fig. 3, is directlybelow the spring fr'. ln this position of the rod S) the rod does nottouch the spring i" by reason ot' the notch referred to; but when therod i) is turned so as to bring the unnotched surl'ace ot' the rod 9under the spring i", the position o'l'l the parts is such that thespring is raised and rests upon the rod 9.

- The raising oll the spring raises the lipped end ofthe pawl r, towhich the spring is attached, out ol" the notches on the wheels o and p,so that the lip on the pawl is held disengaged from the notches on thewheels so long as the rod i) remains in the revolved position. It willthus be seen that by a simple rotation of the head 10 the rod i) is atthe saine time retracted and revolved, and sinniltaneously theserrations on the wheels are disengaged, and the lip on the pawl isdisengaged trom the notches on the wheels. This throws the parts out ofgear, so that the operator may, by turning the crank ai, adjust theniachine at any height on the rack Z.

Upon the periphery ot' the wheel o is placed the projection z, Fig. AVt,which comes in contact with the rod Sl, and acts as a stop to regu1 latethe extent to which the wheel o can be revolved by the spring s.

o c is a column ot' ordinary construction. Upon this column is mounted asplit sleeve or strap, e, having ears w w projecting downward] y on eachside ofthe split.

l is a rod secured to the piece c', which piece c is bowed outwardlyaround the path ofthe hammer, and extends from the guide-rod 7c to theguide-rod 7.a at their tops.

ln the front ofthe rod l is cut a longitudinal T- groove.

3 is a T-bolt the head of which is within the T- groove of the bar 1,and the sha-nk of which projects outwardly through holes drilled in theears zu i0.

Upon the shank ofthe bolt 3 are also arranged two disks, 4- 5, havingtheir adjacent faces serrated to correspond with each other, as shown inFig. 2, one disk beingattached to the guide-rod 1, the other to the earnl of the sleeve on the column..

6 is a setfnnt litted onto a screw-thread on the shank of the bolt 3 insuch manner that when the set-nut is loosened the T- bolt 31nay slidefreely in the groove ofthe rod 1, :and the serrations between the disks4 and 5 may disengage, and the split sleeve t may slide freely on thecolumn n; but when the set-nut 6 is tightened it brings together theears w and w, which causes the sleeve c to clamp the column o, and alsocauses the head of the Tbolt 3 to clamp the groove ofthe bar 1, and alsocauses the serrations of the disks l and 5 to engage with each other, sothat by a simple tightening of the set-nut the connection between theeolkunin and the bar 41, attached to the machine, which was previously auniversal and sliding joint, is made rigid in anyposition in which it isdesired to hold the machine.

The construction ofthe socket for receiving the driltrod is as follows:A round hole is bored into the lower end ot the plunger, leaving thedownwardly -projecting shell ll 12, through the sides ot' which thelongitudinal slot is cut, as shown in Fig. G. The roof or upperextremity of this hole in the plunger is beveled oli' and formed into anincline, as indicated-at 13 18, Fig. 7, which is supposed to be alongitudinal section Ythrough y y, Fig. G. Upon the outer surface ot'the shell 11 12 a screw-thread is cut.

141-1 is a metallic lining for the shell l1 12. which lining is made intwo parts. Each part contains a semicircular portion, 15, iittinglwithin the shell, and extending not quite halt way round the shell, andprovided on its back with a longitudinal rib, 16, which tits within alongitudinal groove in the shell, and pre* vents any rotation betweenthe shell and its lining. The lining is slightly longer than the shell,and is beveled oit at each end, the upper bevel being termed to lit thebevel 13 13 on the plunger, andthe lower bevel being formed to lit thebevel 17 17, formed at the lower end of the serew-thread on the n ut 18.The nut 1S is made to screw onto the exterior of the shell 11 12. TVhenthe lining 15 is in place, as the nnt 18 is tightened the inclinedsurfaces on each end of the lining are forced against the inclines onthe IOO IIO

vof the drill-rod are the lining 15, which, be-

ing removable from the other parts and being light and easily adjusted,may be providedin various sets suited to various forms of drillrods. Theoperatorl may thus use a drill-rod formed of any of the ordinary-shapedsteel bars from which drills are made without the necessity of turningoff the end of the rod to iit the socket of the machine. To prevent thenut 18 becoming loose in operation, the locking device shown at 19 orany other suitable locking device may be employed. 20 is a spring whichtends continually to force the plunger downward with a yieldingpressure.

The construction of the mechanism by which the rotation of the plungeris regulated is as follows: 21 is a ratchet-wheel mounted upon theplunger, and provided with an interior rib or ribs,which engage with aspiral groove or grooves on the exterior of the plunger, in the mannerdescribed in the patent granted to said Parsons, dated October 25, 1881,and numbered 248,787. 22 is a spring-pawl operating in connection withsaid ratchet-wheel, as described in said patent. 23 is anotherratchet-wheel, (not shown in said patent,) and provided with aspring-pawl, 24.-, of the same` character as said first-namedVratchet-wheel and pawl. rlhis ratchet-wheel 23, however, differs fromthe ratchet-wheel2lin tl1at its interior rib engages with a straightlongitudinal groove, 32, on the plunger, so that while a longitudinalmovement of the plunger compels a rotation between the plunger and theratchet-wheel 21 through the medium of the spiral grooves, all rotationbetween the wheel 23 and the plunger under any circumstances isprevented by the engagement of the straight longitudinal groove with therib on the interior of the ratchet-wheel 23. A e

The following is an arrangement for attaching the striking-pin to thedrill-holder orplunger, which we have found useful, since it preventsthe striking-pin from becoming so wedged fast to the other parts that itis difficult of removal, which has been the case with other arrangementsin use. Our arrangement is shown in detail in Fig. 9, which is alongitudinal section through the center of the nut 30. b represents theupper portion of the drillholder. A29 is the striking-pin, which is ofabout the same size as the drill-holder in diameter, and which is heldon top of the drillholder by the nut 30. rlhe nut 30 is attached to thedrill-holder by the screw-thread formed around its upper portion, asshown. Ashoultop of the nut. To attach the striking-pin to thedrill-holder,it is only necessary to unscrew the nut 30, place thestriking-pin 29 in the position within it, so that the top of thestrikingpin projects through the opening at the top of the nut, and thento screw the nut down upon the drill-holder until the lower portion ofthe striking-pin comes in contact with the top of the drill-holder.

rlhe operation of the machine is as follows: The machine is first placedin position, which may be as shown in Figjl, or may be suchY that thedrill is directed in any other direction which may be required; or themachine may be supported on legs, such as are shown in the applicationsalready referred to. The drill being placed in position in its socket onthe end of the plunger, the crank n2 is turned until the point of thedrill rests against the rock. Hand-power is then applied to the leversff, which are attached to the casting bearing the cams, as described inthe applications alrcadyreferred to. The oscillating niotion given tothese cams is communicated to the hammer, which is thus caused tooscillate around the pivot c. Vhen the hammer' is raised, the rear endof the lever g is depressed through the link h, and the forward end israised. This action forces the pin t upward, and strongly compresses therubber spring t. At the same time the upward motion of the forward endof the lever g causes its forked end to engage with the collar b on thedrill-holder or plunger, and the drill is thus raised at the same timethat the hammer is raised, the motion of the two being in unison. When,by the action of the cams, the hammer is released so as to fall, thespring t quickly reacts upon the head of the rod 1'-, and forces theforward end of the lever gdownward. A quick sharp motion is thusconveyed to the hammer in a downward direction, and at the same time theforked forward end of the lever g descends until it ceases to engagewith the collar b upon the plunger, and the plunger or drill-holder isforced forward by the spring 2O until it is supported solely by thepoint of the drill resting upon the rock.

At Fig. 2 it will be noticed that the forked forward end of the lever ghas descended lower than the position in which the collar b is held whenthe drill rests upon the rock, and this is necessary to prevent the blowof the hammer coming upon the end of the lever g, which would be thecase if it remained in contact with the collar b when the blow wasstruck. ln'the manner described, between each blow of the hammer thedrill-holder is raised by the lever g in unison with the motion of thehammer, and is allowed to descend until it rests upon the rock justbefore the hammer delivers its blow, Awhich is a quick sharp blow byreason of the efficient reaction of the spring t, which may be used inconnection with a steel spring or not, as desired.

The operation of the mechanism which re- IOO IIO

volves the drill is as follows: As the plunger is raised by the lever gin the manner de scribed, (the ratchet-wheel 2l being held by the pawl22,) the lips or ribs of the interior of the ratchet-wheel 21, whichengage with the spiral grooves on the exterior of the plunger, compelthe latter to revolve a certain distance as it is raised. Vhen theplunger begins to descend, its tendency is in turn t-o revolve theratchet-wheel, and this is permitted on the downward stroke by the pawl22, which holds the ratchet-wheel only from revolving in one direction.Thus in the machine there 1s nothing to cause the plunger to revolveback again on its downward stroke; but it has been found that thecontact of the point of the drill with the rock, acting as a sort of acam upon the lower end of the drill, has a tendency to returnthe drillto the same position which it previously occupied at the bottom of theborehole, and this has a tendency to revolve the plunger back again inaccomplishing this result. To obviate this, the ratchet-wheel 23 is alsoplaced upon the plunger, and is provided with a spring-pawl similar tothe other ratchet-wheel. This second ratchet-wh eel has a lip on itsinterior surface, which engages with a straight longitudinal groove uponthe exterior of the plunger. This second ratchetwheel is free to revolvein the direction in which the plunger is revolved during its upwardstroke, but is held by the pawl from revolving in the oppositedirection, and since there can be no revolution of the ratchetwheelaround the plunger, the plunger is compelled,lby the engagement of thelip on the interior of the ratchet-wheel with the groove on the exteriorofthe plunger, to descend in a straight line without rotation. It isthus insured that the drill should always cut the rock in a differentposition from that where it previously rested upon it, which newposition is determined by the extent to which the plunger is revolved bythe combination of the spiral grooves and the ratchet first named.

The operation of the mechanism for feeding the machine forward as thedrilling proceeds is as follows: Generally the rod q will occupy theposition shown in Fig. 2, so that while the end of the lever g is belowits highest position the rod q will project above it, and will not beacted upon by the motions of the lever g; but as the drill entersfarther and farther into the rock the time will come when the shoulder bon the plunger will strike against the short arm r of the pawl lr andraisethe lip upon the opposite end of said pawl out of the notches inthe wheels o and p. As soon as this is effected the wheel o .is free torevolve around the shaft a in the direct-ion of the arrow, Fig. 4, andis compelled to do so by the action of the spiral spring s until it isrevolved so far that the projection a on its periphery comes in contactwith the rod 9. The rotation of the wheel o in this directionindependently of the wheel p is permitted by the form of the serrationsbctween the two wheels, as shown in Fig. 57 and during this motion ofthe wheel o, and while the lip of the pawl r is disengaged from thenotches in the wheels o and p, the wheel p is prevented from revolvingby the engagement of its conical friction-surface with that upon ,theframe c, as shown in Fig. 5, said surfaces being pressed together by theend pressure of the spring s. The wheel p, and consequently the shaft a,to which it is fast, are thus held from revolving during the rotation ofthe wheel o in the direction of the arrow, the eX- t-ent of whichrotation is regulated by the p0- sition of the stop z. This stopprevents the further rotation of the wheel o in the direction of thearrow. The rotation of the wheel o in the direction of the arrow, asdescribed, carries downward the rod q, which is pivoted to it, asalready described, and the parts remain in this condition until thelever g, moving upward again, raises the rodi q to the position which itpreviously occupied. This upward motion, however, of the rod g compelsthe wheel o to revolve backward to the position from which it started.In doing so, by reason of the form of the serrations between the wheelso and p, it carries with it the wheel p, which, being fast to the shaftn, compels that shaft and the pinion m to revolve in unison with thewheel 0. The rotation of the pinion m, however, causes the latter totravel upon the rack l, and the machine is fed forward on the rack adistance which is dependent upon the extent of rotation of the pinion m.In the meantime the contact between the short arm of the pawl r and theshoulder on the plunger is broken, and the spring r' compels the lip onthe pawl i to return into the notches in the periphery of the wheels oand p as soon as the wheel 0 is revolved back to the position from whichit started. The position of the parts shown in Fig. 5 is thus heldpositively until the drill has again progressed so far that the shoulderb on theplunger again on its downward stroke raises the lip upon thepawl fr out of the notches of the wheels o and p, when the operationjust described will be repeated. AIn this manner the position of themachine is held positively until, at determined intervals, it is fedforward, causing the position of t-he machine to keep pace with thetravel of the drill. Vhenever it is desired to remove the drill entirelyfrom the hole for the purpose of renewing it or changing its posit-ion,the operation is simply to retract and turn the rod 9, as alreadydescribed, and then, by turning the crank n?, to run the pinion to anydesired position in the rack Z.

It will be observed that the pinion fm and rack Z act as the mechanismto support and feed the machine on the guides 7c k; that the mechanismshown Vin Fig. 5 acts to alternately lock and actuate the feedingmechanism; that the said locking and actuating mechanism is unlocked bythe travel of the drill-holder, and that the power for driving thefeed-actu- ICO ating mechanism forward is received from the l rod, thedrill-holder, and the hammer of a reciprocating hand-levers.

We claim- 1. rlhe combination, with the drill-holder b and hammer-arm cZof a drill-machine, of the lever g, having one end connected with thehammer-arm and its other engaging the drillholder, the inclosnre y',attached to the drillframe, and the spring t, connected to said lever,substantially as described.

2. The combination, in a rock-drill, of the frame c, the feedingmechanism, and the drill-holder with a lever pivoted to the frame, andconstructed and arranged f to both act directly on the drill-holder andfeed the frame toward the rock, substantially as described.

3. In a drill-machine, the combination, substantially as described, withthe pivoted vibrating hammer-arm d, of lever g, the link h, connectingsaid lever and hammer-arm, and a spring attached to said lever, for thepurpose set forth.

Ll. In combination, the framec, the drillholder b, the vibrating leverg, pivoted to the frame and operating directly on the drillholder, andconnected with the vibrating hammer-arm (Z, whereby the raising of thehammer causes the drill to rise, and the release of the hammer causesthe drill-holder to be said pawl and said pinion, constructed to revolvesaid pinion a certain distance when the drill has advanced far enough tobring said pawl into action.

6. In combination with the frame of a rockdrilling machine, the rack Z,the drill-holder b, sliding on said frame, the pawl 1', and the wheel o,both supported thereon, the springs s, for actuating said wheel whenreleased by said pawl, the pinion m, operating on said rack and havingthe wheel p connected therewith, connecting mechanism between saidwheels, whereby rotation of the wheel o in one direction may be effectedwhile the wheel p is at rest, while rotation of the wheel o in theopposite direction carries the wheel p with it, and mechanism,substantially as described, connecting said wheel o with the source ofpower.

7. In combination, the hammer, the lever g, pivoted to the frame of thedrill and operated by the motion of said hammer, the rack Z, connectedto the guide-rod of said frame, the pinion m, operating on said rack,the wheel 0, connected with said pinion, and mechanism, substantially asdescribed, connecting said wheel 0 with said lever g, whereby saidpinion is operated by the motion of the hammer, as setforth.

S. The combination of the frame, the guiderock-drilling machine,the rackZ, supported on the guide-rod, the pinion m, operating on said rack, thcpawl r, constructed to be operated by the drill-holder and to regulatethe motion ot' the pinion, with the friction mechanism, substantially asdescribed, constructed to prevent the mechanism.operating said pinionfrom overrunning when released by said pawl.

9. In combination with the drill and hammer-actuating mechanism, theframe c, constructed in two branches, both ends of each branch beingfirmly united to the other branch, thef'bearings for the drill-holderbeing formed at one point of unison, and the bearings for thehammer-operating mechanism being formed at or near the other point ofunison, and space being provided between the two branches to t accolnmodate the mechanism intermediate the drill-holder and the bearings forthe hammer.

10. In combination, the grooved bar l, the bolt 3, having its head ttingin the groove in the bar, the sleeve c, provided with the ears w w', andthe nut 6, whereby the joint between the drill-machine and a column maybe tightened or loosened and the machine raised or lowered,substantially as described.

1l. The combination, in a drilling-machine, of the guide It for theframe thereof, along which said frame travels, the rack Z, connectedwith said guide, the pinion m, operating on said rack, the ratchet-wheelp, connected with said pinion, the drill-holder sliding in said frame,and the lever g, fulcrumed on the same, constructed to raise thedrillholder and move the frame in opposite directionssimultaneouslythrough mechanism, substantially Vas described, interposedbetween said lever g and said wheel p.

12. The combination, in a drill-coupling, of the drill and thedrill-holder, said holder having a socket inclinedjn ward at the topwith a divided lining having its top and bottom ends tapered inward, andanut fitting athread on the outside ofthe drill-holder, and providedwith an inclined iiange, substantially as described.

13. The combination, in a drilling-machine, of a hammer, thevibrating-lever pivoted to the frame and connected to the hammer and tothe drill-holder, and a spring constructed and arranged to force forwardthe drill and assist in giving the hammerits forward stroke,substantially as shown and described.

14. In a drillmachine, the combination, with feeding mechanism, as thepinion m and rack Z, and mechanism, as the wheel o and the clutchconnected therewith, and the pawl r, connected with the pinion m, forcontrolling the motion of the same, of the rod 9, moving in the frame;and constructed to engage' with and move said wheel o and pawlr,where bysaid feeding mechanism may be disconnected and operated by the hand,substantially as described.

15. In a drilling-machine, and in combina- IOO IIO

tion with the supports and frame thereof, a drill-holder or plunger, asb, working in said frame, an oscillating handle, as f, pivoted to theframe, a holding1 device, as the rack Z, connected with said supports,and feeding mechanism, as the pinion m, operating on said rack, lockingand actuating mechanism, substantially as described, connected with saidfeeding mechanism, controlled by the motion of and combined with saiddrill-holder, whereby said locking and actuating mechanism is unlockedby motion derived from the travel of the drillholder, and mechanism,substantially as described, connecting said locking and actuatingmechanism with said hand-lever, constructed to give the forward motionof the feeding mechanism from the motion of the hand-lever,substantially as shown and set forth.

16. In combination, the drill-holder b, the nut 30, having flange b,engaging with the lever g and the strikingpin 29, said strikingpin beingprovided with ashoulder which engages with the corresponding flange onthe nut 30, whereby said nut perfornis the double function of holdingthe pin and engaging with the lever g, substantially as described.

17. In a rock-drilling machine, and in combination with the framethereof and the guiderod for the same, the rack Z, connected with saidguide-rod, the pinion m, operating in connection with said rack, thevibrating lever g, pivoted on the frame, and mechanism, sub stantiallyas described, between said lever g and pinion nl, the drill-holder, anda device, substantially as described, communicating with thedrillfholder, and constructed to automatically throw out of gear theconnection between the lever g and pinion m, as set forth.

1S. In a rock-drilling machine, and in combination with the framethereof and the guiderods for the same, the drill holder working in theframe, the vibrating lever y, pivoted to the frame and constructed toraise the drillholder as the hammer is raised, the rack Z,

said pinion, whereby the motion from said lever is communicated to saidpinion to Vfeed the machine, as set forth.

19. In a roclcdrilling machine, and in combination with the framethereof and the guiderod for the same, the drillholder sliding in saidframe, the hand-lever and the vibratinglever g working thereon forraising the drill, and a cani operated by said hand-lever interposedbetween said handlever and the lever y, the rack Z, connected with thesupport for the frame, the pinion m, operating in connection with saidlever r/ and rack Z, whereby said pinion is actua-ted through said leverg by the power applied tothe hand-lever, as set forth.

20. In a rock-drilling machine, and in combination with the frame andguide thereof,the drill-holder sliding in said frame, the lever g,working thereon, the rack Z, connected to the guide, the pinion m,working on said rack, and the lifter moving with said drill holder,whereby the connection between said pinion and said lever g is made whenthe drill has advanced to the point where further feed is required, butbroken when the feed has been accomplished, as set forth.

2l. Ina rock-drilling machine, and in combination with the frame and theguide thereof, the drill-holder sliding in said frame, the lever y,working thereon, the rack Z, connected to the guide, and pinion m,working on said rack, the lifter moving with the drill-holder, and themechanism, substantially as described, connecting said lever with saidpinion, and controlled by the position ofthe drill-holder, whereby theconnection between` the pinion and leverg is made when the drill has advanced to a predetermined point and broken when the feed has beenaccomplished, as set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

HENRY FRANCIS PARSONS. BROR F. BERGH.

XVitnesses:

L'IvlNGs'roN Girronn, DANIEL I-I. DRIscoLL.

